Buy this only if u have Half Life 2, or every (almost) in-game item for you will be a red error sign.

Don't buy this crap - DLC campaigns are 15 min long, self-repeating missions, enemies aren't also very smart. Ok, the slow-mo is epic, graphics and controls are great, but actually it gets annoying, when almost every kill is slow-moed. Just play demo (includes 1 mission) and stay away from the full game. Played it for few hours and just couldn't do it more.

The only bad thing about Dota 2 - you can't join or leave whenever you like. It would ruin the game for others. Nevertheless, this game is perfect - CS killsounds are epic + you can get it for PHR33!